walbeidqe



No Moaei 2 SheetsSheet 1.

H. S. WALBRIDGE. STBREOSOOPE.

No. 561,930. Patented June 9, 1896.

275% aa/r .J.MZ

(N0 Mpdel.) 2 Sheets-Sheet 2.

H. s. WALBRIDGE.

STEREOSUOPE.

No. 561,930. PatentedJune 9, 1896.

UNITED STATES PATENT @EETQE.

HENRY S. NALBRIDGE, OF NORTH BENNINGTON, VERMONT. I

STEREOSCOPE.

SPECIFICATION forming part of Letters Patent No. 561,930, dated June 9,1896.

Application filed November 23, 1895. Serial No. 569,914. (No model.)

To (ZZZ whom it may concern.-

Be it known that I, HENRY S. WALBRIDGE, a citizen of the United States,residing at North Bennington, county of Bennington, and State ofVermont, have invented certain new and. useful Improvements inStereoscopes, of which the following is a specification.

The invention relates to such improvements; and it consists of the novelconstruction and combination of parts hereinafter described andsubsequently claimed.

Reference may be had to the accompanying drawings, and the letters ofreference marked thereon, which form a part of this specification.

Similar letters refer to similar parts in the several figures therein.

Figure 1 of the drawings is a view in side elevation of my improvedstereoscope. Fig. 2 is a front elevation of the same. Fig. 3 is avertical cross-section taken on the broken line 3 3 in Fig. 2. Fig. 4 isa bottom plan view of the device shown in Fig. 1. Fig. 5 is a plan viewof the recessed bridge-piece detached.

A is the frameshaft, which is provided with a handle A, anobject-support A and a division-shield A, the handle -support and shieldbeing of the usual well-known construction.

The block 13, which supports the lenses B in the usual manner, israbbeted to produce the edge flange or rib B on three of its side edges,leaving the bottom side edge plane, as at B The front end of the shaftis secured to the plane edge of the block by means of screws H.

The hood G is secured to the lens-block, as by tacks C, so that theinner edges of the hood rest upon the flange E the ends C of the hoodterminating at the junction of the rabbeted edges and the ends of theplane unrabbeted edge The side of the lens-block in ving the plane edgeis provided in its face with a groove or channel B which groove isparallel with the plane edge and removed a short distance therefrom.

I erect from the lens-block a bridge-piece D, preferably of about thesame thickness as the hood and adapted to enter and tightly fit theblock-groove, as shown.

The bridge-piece is provided with a recess D in one side adapted to makeroom for the nose of the user of the stereoscope, and is of the properlength to connect the ends C of the hood, the ends of the bridge-piecelapping interiorly the ends of the hood, as shown in Fig. 2. The lappingends of the bridge-piece are glued or otherwise secured to the ends ofthe hood, thereby forming a rigid and stable hood or shield entirelyaround the lens-block.

As an additional or independent means for securing the ends of the hoodto the adjacent edges of the bridge-piece I secure a strip of fabric Fto the front edges of the hood and bridge, as shown in Fig. 4, by gluingthe strip to such edges and extending the strip in a continuous pieceacross the junction of each end of the bridge with the adjacent end ofthe hood, whereby I not only bind the edges of the respective parts intheir proper relative positions, but conceal the junction-lines betweenthe parts.

By erecting the bridge-piece from the lens block a short distance withinits plane edge it is farther removed from the nose when in use, wherebythe eyes of the observer are shielded on all sides from the lightwithout interfering with the convenient and successful operation of thedevice, and that portion of the lens-block beneath the lenses can bemade sufficiently deep to form a solid and sufficient means of supportfor the attachingscrews B or other means of attachment. I also bevel thelower face of the front edge of the shaft, as seen at D, which increasesthe size of the opening in front of the lenses and eliminates the sharpedge heretofore formed on the face of the front edge of the shaft.

What I claim as new, and desire to secure by Letters Patent, is

1. In a stereoscope, the combination with the lens-block, and hoodinclosing the block on three of its side edges, of the recessedbridge-piece erected from the fourth side of v the lens-block Within itsedge, and lapping in the bloc-legroove and connecting the ends of thehood, substantially, as described.

In testimony whereof I have hereunto set my hand this 14th day ofNovember, 1895, H. S. WALBRIDGE.

\Vitnesses:

GEO. A. MosHER, FRANK C. CURTIS.

